Lewisham · Greater London
Crack stitching in Lewisham
Got a crack you can slip a coin into? In Lewisham, as anywhere, that is usually wide enough to justify stitching rather than filling, provided an engineer or surveyor agrees the wall has stopped moving.
Guide price from£100per metre of crack inc VAT
- Postcodes
- BR3, SE4, SE6, SE12, SE13
- Population
- about 300,000
- Area
- Greater London
- Pricing region
- London
Is Greater London prone to ground movement?
Lewisham takes in postcode districts including BR3, SE4, SE6, SE12, SE13, with about 300,000 residents. If you are just outside Lewisham, we also cover Southwark (3 miles), Greenwich (4 miles) and Lambeth (4 miles).
Greater London is one of the parts of the UK where clay soils are most likely to move with the seasons. Ground movement here is more often linked to soils, drains and trees than to mining. Typical buildings in Greater London: Victorian and Edwardian terraces with shallow footings, inter-war semis in the outer boroughs, and converted flats and mansion blocks.
What to look for before calling about crack stitching
- Stepped cracking beside a window, door or corner
- Bricks split clean through where the crack crosses them
- A crack visible on both the inside and outside face of the wall
Crack stitching prices in Lewisham
The ranges below reflect typical London costs for crack stitching, including VAT. Scaffold, access and making good can push a job to the top of the range.
| Item | Guide price | Per |
|---|---|---|
| Crack stitching with stainless helical bars | £100 – £225 | per metre of crack |
| Small jobs (minimum visit)est. | £440 – £625 | per visit |
| Repointing over the stitched line in matching mortarest. | £40 – £75 | per metre |
How we usually approach crack stitching
Helical bars in cementitious grout
The most common approach. A slot is cut along the bed joint with a twin-blade cutter, flushed out and part filled with a cement-based grout. The helical bar is pushed in, more grout is packed over it, and the joint is pointed to match. The grout cures over a few days.
Best for: Most brick and block walls, including older softer bricks
Helical bars in resin grout
A resin grout bonds quickly and strongly to the bar and masonry and suits wet conditions or work that must take load sooner. It is less forgiving of soft or crumbly bricks, so the choice of grout is made wall by wall rather than as a rule.
Best for: Dense bricks, damp walls and repairs needing a fast cure
What happens during crack stitching, step by step?
Confirm the cause has stopped
Before quoting we check what made the wall crack and whether it is still moving. If there is doubt, we suggest a period of monitoring or an engineer’s view, rather than stitching a crack that will simply open again.
Cut, clean and grout
Slots are cut into the bed joints to the right depth, dust is blown and washed out, and grout is placed. The bars are pressed home and covered, and the crack line is filled or injected.
Repoint to match
The cut joints and crack are pointed in a mortar chosen to match the colour, texture and strength of the existing work. On older houses with soft bricks, a lime mortar is used so the repair does not trap moisture.
Rules for crack stitching in England
Like-for-like repairs such as crack stitching and repointing do not usually need building control approval in England, but anything that changes or strengthens the structure, such as underpinning or rebuilding a wall, does. If the work touches a party wall, the Party Wall etc. Act 1996 may apply.
Questions about crack stitching in Lewisham
How much should I budget for crack stitching in Lewisham?
Guide prices for crack stitching in Lewisham start from about £100 per metre of crack, including VAT, on London rates. Your fixed written price follows photos or a survey and depends on the extent of the work and access.
Can you survey a property in Lewisham?
Yes, Lewisham is covered, along with postcode districts BR3, SE4, SE6, SE12. We also cover nearby Southwark and Greenwich.
Why do houses in Greater London crack?
Most of Greater London sits on London Clay, among the most shrinkage-prone ground in the UK, with river gravels along the Thames. Subsidence claims here are among the most frequent in the country, especially after dry summers and near street and garden trees. Only an investigation can say why a particular building has moved.
Can I stitch a crack myself?
It is possible on a small, stable crack, but the work involves cutting into joints with a twin-blade cutter, controlling silica dust and placing the bars correctly. If the crack is part of an insurance claim or is wide, have it assessed first, because a poor repair can hide ongoing movement.
Will crack stitching be visible afterwards?
Usually only slightly, because the bars sit inside the mortar joints and are pointed over. The main giveaway is the colour of new mortar, which can take a few months to weather. Careful mortar matching keeps the line discreet, especially on older brickwork.
Related work in Lewisham
- Extension pulling away repairs
- Subsidence insurance claim repairs
- Brick arch repairs
- Bowing wall repairs
- Concrete repairs
Crack stitching near Lewisham
Get a fixed price in writing for crack stitching in Lewisham once the repair is specified, with internal making good shown as a separate line.